ForewordThis amendment to IEEE Std 1584-2002 offers guidelines on how to apply the document based on experience gained by users since its publication.As defined by the IEEE operating procedures@ a guide is a document in which alternative approaches to good practice are suggested@ but no clear-cut recommendations are made. This guide is intended to be used only by qualified people. The complexities of electrical power system configurations and equipment dictate that@ like short-circuit studies and protective-device coordination studies@ an arc-flash hazard study should only be undertaken by experienced electrical power system engineers or other well-trained professionals. Those who are not this qualified are encouraged to use a table method to select personal protective equipment (PPE). A set of cautions and disclaimers is provided in the guide and reproduced in the spreadsheet calculator to help users understand the limitations in the technology. Proper PPE based on arc-flash hazard calculations or tables is the last line of defense against arc-flash hazards. Other mitigation techniques@ as in the following list@ provide a much better defense. A facility owner and employees working on equipment should be aware of all the limitations. The warning labels in rated PPE help to do this. However@ users should recognize that following codes@ standards@ guides@ and recommended practices does not guarantee that all arc-flash injuries will be avoided.De-energizing remains the first choice as a means of achieving an electrically safe working condition and reducing the possibility of injury@ but that is not always possible. Also@ incidents have occurred during the action of de-energizing equipment to create the safe worlung condition and during switching to re-establish power. For these occasions@ an arc-flash hazard analysis and the institution of a PPE program provide great value in reducing the likelihood of injuries in an arc flash.These studies may identify equipment where the possible incident energy levels are so high that PPE is not available or not recommended. In those cases@ operating procedure or engineering design changes may need to be considered to reduce the exposure or incident energy levels. Developing these changes is an important part of implementing a study??s results. Examples of some of these changes include the following:Changing operating procedures to eliminate or minimize the time that two sources of power are tied together Resetting or replacing existing protective devices to get faster fault clearing timesAdding fast operating relays or current-limiting devices to reduce fault clearing timesAdding remote racking and operating capabilityInstalling arc-resistant switchgearNotice to usersErrataErrata@ if any@ for this and all other standards can be accessed at the following URL: http://standards.ieee.ore eadine/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata periodically.InterpretationsCurrent interpretations can be accessed at the following URL: http://standards.ieee.org eading/ieee/interp/index.html.PatentsAttention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard@ no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patents or patent applications for which a license may be required to implement an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention.ParticipantsWhen the IEEE 1584 Working Group approved this amendment@ it had the following membership:Craig M. Wellman@ ChairL. Bruce McClung@ Vice ChairDaleep C. Mohla@ SecretaryDonald BaumanAllen H. BinghamJohn CadickMary Capelli-SchellpfefferDonald ColaberardinoStephen CressD. Ray CrowChet DavisDaniel DoanPaul DobrowskyMike DohertyJohn GallagherTammy GammonGeorge GregoryDennis JohnsonErnest JonesKenneth S. JonesHerman ??Buddy?? KempMike LangLonnie LindellKevin LippertHugh LongacreTommy LucasMichael MartinJohn (Jackie) McalhaneyBen McClungMicheal MelnickDoug MillsAdib NasleAli NasleTom NealJohn NelsonDavid A. PaceMelvin K. SandersVince SaporitaBrian SavariaEdwin ScherryRobert SeitzFarrokh ShokoohConrad St. PierreTony StokesAlan TurnerMarcelo ValdesKenneth P. Kathleen WilmerBill WoodsBrian WrightThe following members of the individual balloting committee voted on this amendment. Balloters may have voted for approval@ disapproval@ or abstention.Alonza W BallardLouis A BarriosJames E BowenFrederick BriedKristine K BuchholzDonanld ColaberardinoGary DiTroiaDaniel DoanPaul DobrowskyGary DonnerBruce G DouglasKimberly EastwoodH Landis FloydGeorge GregoryErling C HeslaJIm D HillStephen H KerrDanny LiggettBruce McClungMichael McNeilDaleep MohlaWilliam MoylanPaul MyersTom NealDaniel NeeserJohn NelsonArt NeubauerT W OlsenDavid PaceLorraine PaddenGiuseppe PariseJohn PropstMelvin SandersVincent SaporitaMary Capelli SchellpfefferDennis ThonsgardMichael ToneyMichael WactorCraig WellmanDonald W. ZipseWhen the IEEE-SA Standards Board approved this amendment on 23 September 2004@ it had the following membership:Don Wright@ ChairSteve M. Mills@ Vice ChairJudith Gorman@ SecretaryChuck AdamsMark S. HalpinH. Stephen BergerRaymond HapemanMark D. BowmanRichard J. HollemanJoseph A. BruderRichard H. HulettBob DavisLowell G. JohnsonRoberto de BoissonJoseph L. KoepfingerJulian ForsterHermann KochArnold M. GreenspanThomas J. McGeanDaleep C. MohlaMember EmeritusAlso included are the following nonvoting IEEE-SA Standards Board liaisons:Satish K. Agganval@ NRC RepresentativeRichard DeBlasio@ DOE RepresentativeAlan Cookson@ NIST Representative Noelle D. HumenickIEEE Standards Project EditorPaul NikolichT. W. OlsenRonald C. PetersenGary S. RobinsonFrank StoneMalcolm V. ThadenDoug ToppingJoe D. WatsonScopeThis guide provides techniques for designers and facility operators to apply in determining the arc-flash hazard distance and the incident energy to which employees could be exposed during their work on or near electrical equipment.